import java.net.*;
import java.util.*;
public class d {
	public static void main(String args[]){
		Scanner scanner =new Scanner(System.in);
		Thread readData;
		ReceiveLetterForZhang receiver =new ReceiveLetterForZhang();
		try{
			readData = new Thread(receiver);
			readData.start();
			byte [] buffer =new byte[1];
			InetAddress address = InetAddress.getByName("127.0.0.1");
			DatagramSocket postman=new DatagramSocket();
			System.out.print("输入法送给李四的信息：");
			while(scanner.hasNext()){
				String mess =scanner.nextLine();
				buffer =mess.getBytes();
				if(mess.length()==0){
					System.exit(0);
				}
				buffer=mess.getBytes();
				dataPack
			}
			
		}
	}
	
    
}
